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01A (01 Advisors)

01a.com · San Francisco, CA (415 Jackson, San Francisco, CA 94111) and New York, NY (817 Broadway, New York, NY 10003) · founded January 2018 · team 3 General Partners (Dick Costolo, Adam Bain, David Fischer) plus operating partners and associates · Series A through C (primarily Series B), post-product-market-fit · trust 0/4

For Operators, by Operators - invests post-product-market-fit, helps companies scale teams and GTM

This dossier was built by Clark from a public scan on 2026-07-04 and is unclaimed. Is this your startup? Claim it.

Verified facts

Firm name01A (also known as 01 Advisors)
source: https://01a.com (website), https://www.linkedin.com/posts/01a_01-advisors-founded-by-dick-costolo-and-activity-7127780529650728960-W6KV (LinkedIn post)
Investment thesis/focusFor Operators, by Operators - invests post-product-market-fit, helps companies scale teams and GTM
source: https://01a.com/about page (website), LinkedIn post at https://www.linkedin.com/posts/01a_01-advisors-founded-by-dick-costolo-and-activity-7127780529650728960-W6KV
Office locationsSan Francisco, CA (415 Jackson, San Francisco, CA 94111) and New York, NY (817 Broadway, New York, NY 10003)
source: https://01a.com (website footer)
Year foundedJanuary 2018
source: Multiple SEC filings (DEF 14A Opendoor Technologies, Virgin Galactic prospectus, SoFi Technologies), TechCrunch article at https://techcrunch.com/2023/11/07/01-advisors-founded-by-dick-costolo-and-adam-bain-just-closed-on-395m-more/
Number of partners/investors3 General Partners (Dick Costolo, Adam Bain, David Fischer) plus operating partners and associates
source: LinkedIn post at https://www.linkedin.com/posts/01a_01-advisors-founded-by-dick-costolo-and-activity-7127780529650728960-W6KV, https://01a.com (website team roster)
Investment stage/check sizesSeries A through C (primarily Series B), post-product-market-fit
source: https://01a.com/about page (website), LinkedIn post at https://www.linkedin.com/posts/01a_01-advisors-founded-by-dick-costolo-and-activity-7127780529650728960-W6KV
Founding/managing partnersDick Costolo (former Twitter CEO) and Adam Bain (former Twitter COO/President and Facebook CRO)
source: https://01a.com (website), TechCrunch article at https://techcrunch.com/2023/11/07/01-advisors-founded-by-dick-costolo-and-adam-bain-just-closed-on-395m-more/
Legal entity type/registrationPrivate venture capital firm (entity type not publicly disclosed)
source: Website and public records do not explicitly state entity type; references to California office address in SEC filings
Public email on firm domainhello@01a.com
source: https://01a.com (website contact section)

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